Function Group: Phosphate

Phosphate groups consist of a phosphorous with one double bonded oxygen and two upper O upper H groups. Another oxygen forms a link from the phosphorous to a carbon chain. Both upper O upper H groups in phosphorous can lose an H positive ion, and phosphate groups are considered acidic.

Figure 2.27 (OpenStax, Biology 2e) caption: These functional groups are in many different biological molecules. R, also known as R-group, is an abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule.

(Source: OpenStax)

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